Page 175 - Modular design for machine tools

Application of Machine Tool Description to Engineering Design 135

TABLE 4-1 Typology of Japanese-Make MCs in 1993
Functional description
Spindle type /XYZC BXZ/YC
XY/ZC Y/XZC BX/ZYC X/YZC Y/ZXC Others
(/YXZC) (BZX/YC)
Single-spindle
of horizontal 1 8 5 7
type
Single-spindle
of vertical 17 15 5 4 6 11
type

2. The newcomer is the vertical MC of Y/XZC type: this trend could be
derived from the positive application of the vertical MC to FMC and FTL.
In this context, Lee et al. have suggested a shortcoming: The functional
description cannot distinguish the differences in certain structural con-
figurations, as shown in Fig. 4-3 due to its simplicity. In retrospect,
Vragov already pointed out this problem, taking a description XOYZ
shown already in Fig. 3-2 as an example in the early 1970s [5]. At
present, there is no research being done into this problem.

4.1.2 Analysis of machining function and
its application to evaluate compatibility
with production systems
Although the description becomes relatively complex, an extended func-
tional description has been proposed to associate the analysis of the machin-
ing functions possible within a machine. In the extended description, the

Z
Y

C
C Z

Y
X
X
(a) (b)
Figure 4-3 Structural configurations corresponding to functional description /XYZC—
certain constraint due to description simplicity.